In our correspondence about the illustrations, the coherence and consistency of the nonsense on its own nonsensical understanding often became prominent. One of the first three I had to do was the disappearance of the Baker, and I not unnaturally invented a Boojum. Mr. Dodgson wrote that it was a delightful monster, but that it was inadmissible. All his descriptions of the Boojum were quite unimaginable, and he wanted the creature to remain so. I assented, of course, though reluctant to dismiss what I am still confident is an accurate representation. I hope that some future Darwin, in a new Beagle, will find the beast, or its remains; if he does, I know he will confirm my drawing.

The Annotated The Hunting of the Snark